File · runs in your browser
File Size Converter
Convert between bytes and larger units using decimal (1000-based, as OSes report downloads) or binary (1024-based) definitions.
- Supported formats
- B / KB / MB / GB / TB
- Max file size
- Max —
- Speed
- Real-time
- Free
- Free, no sign-up
Base
- B1,000,000
- KB1,000
- MB1
- GB0.001
- TB0.000001
- PB0
Storage vendors typically use decimal units; operating systems typically report binary units — this is why a "1 TB" drive shows less than 1,000 GB free.
Private by design. This tool runs entirely inside your browser — your files are never uploaded, stored or seen by anyone, including us.